Group 1 - The core issue is a data-center problem that caused a halt in trading futures and options on the Chicago Mercantile Exchange (CME), leading to thin liquidity in forex and bonds markets [1] - The outage also impacted forex trading on the EBS platform, which is part of the CME Group, further contributing to the liquidity issues [2] - The situation is worsened by low liquidity conditions following the U.S. Thanksgiving holiday, indicating potential for choppy trading in the near term [1]